{"title":"An asymptotic preserving scheme for the defocusing Davey–Stewartson II equation in the semiclassical limit","authors":"Dandan Wang, Hanquan Wang","doi":"10.1093/imanum/draf019","DOIUrl":null,"url":null,"abstract":"This article is devoted to constructing an asymptotic preserving method for the defocusing Davey–Stewartson II equation in the semiclassical limit. First, we introduce the Wentzel–Kramers–Brillouin ansatz $\\varPsi =A^\\varepsilon e^{i\\phi ^\\varepsilon /\\varepsilon }$ for the equation and obtain the new system for both $A^\\varepsilon $ and $\\phi ^\\varepsilon $, where the complex-valued amplitude function $A^\\varepsilon $ can avoid automatically the singularity of the quantum potential in vacuum. Secondly, we prove the local existence of the solutions of the new system for $t\\in [0,T]$, and show that the solutions of the new system are convergent to the limit when $\\varepsilon \\rightarrow 0$. Finally, we construct a second-order time-splitting Fourier spectral method for the new system and numerous numerical experiments show that the method is uniformly accurate with respect to $\\varepsilon $, i.e., its accuracy does not deteriorate for vanishing $\\varepsilon $, and it is an asymptotic preserving one. However, it might not be uniformly convergent.","PeriodicalId":56295,"journal":{"name":"IMA Journal of Numerical Analysis","volume":"79 1","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IMA Journal of Numerical Analysis","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.1093/imanum/draf019","RegionNum":2,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATHEMATICS, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
This article is devoted to constructing an asymptotic preserving method for the defocusing Davey–Stewartson II equation in the semiclassical limit. First, we introduce the Wentzel–Kramers–Brillouin ansatz $\varPsi =A^\varepsilon e^{i\phi ^\varepsilon /\varepsilon }$ for the equation and obtain the new system for both $A^\varepsilon $ and $\phi ^\varepsilon $, where the complex-valued amplitude function $A^\varepsilon $ can avoid automatically the singularity of the quantum potential in vacuum. Secondly, we prove the local existence of the solutions of the new system for $t\in [0,T]$, and show that the solutions of the new system are convergent to the limit when $\varepsilon \rightarrow 0$. Finally, we construct a second-order time-splitting Fourier spectral method for the new system and numerous numerical experiments show that the method is uniformly accurate with respect to $\varepsilon $, i.e., its accuracy does not deteriorate for vanishing $\varepsilon $, and it is an asymptotic preserving one. However, it might not be uniformly convergent.
期刊介绍:
The IMA Journal of Numerical Analysis (IMAJNA) publishes original contributions to all fields of numerical analysis; articles will be accepted which treat the theory, development or use of practical algorithms and interactions between these aspects. Occasional survey articles are also published.